/**
 * jQuery JSON plugin 2.4.0
 * 
 * @author Brantley Harris, 2009-2011
 * @author Timo Tijhof, 2011-2014
 * @source This plugin is heavily influenced by MochiKit's serializeJSON, which
 *         is copyrighted 2005 by Bob Ippolito.
 * @source Brantley Harris wrote this plugin. It is based somewhat on the
 *         JSON.org website's http://www.json.org/json2.js, which proclaims: "NO
 *         WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment
 *         that I uphold.
 * @license MIT License <http://opensource.org/licenses/MIT>
 */
(function($) {
	'use strict';

	var escape = /["\\\x00-\x1f\x7f-\x9f]/g, meta = {
		'\b' : '\\b',
		'\t' : '\\t',
		'\n' : '\\n',
		'\f' : '\\f',
		'\r' : '\\r',
		'"' : '\\"',
		'\\' : '\\\\'
	}, hasOwn = Object.prototype.hasOwnProperty;

	/**
	 * jQuery.toJSON Converts the given argument into a JSON representation.
	 * 
	 * @param o
	 *            {Mixed} The json-serializable *thing* to be converted
	 * 
	 * If an object has a toJSON prototype, that will be used to get the
	 * representation. Non-integer/string keys are skipped in the object, as are
	 * keys that point to a function.
	 * 
	 */
	$.toJSON = typeof JSON === 'object' && JSON.stringify ? JSON.stringify
			: function(o) {
				if (o === null) {
					return 'null';
				}

				var pairs, k, name, val, type = $.type(o);

				if (type === 'undefined') {
					return undefined;
				}

				// Also covers instantiated Number and Boolean objects,
				// which are typeof 'object' but thanks to $.type, we
				// catch them here. I don't know whether it is right
				// or wrong that instantiated primitives are not
				// exported to JSON as an {"object":..}.
				// We choose this path because that's what the browsers did.
				if (type === 'number' || type === 'boolean') {
					return String(o);
				}
				if (type === 'string') {
					return $.quoteString(o);
				}
				if (typeof o.toJSON === 'function') {
					return $.toJSON(o.toJSON());
				}
				if (type === 'date') {
					var month = o.getUTCMonth() + 1, day = o.getUTCDate(), year = o
							.getUTCFullYear(), hours = o.getUTCHours(), minutes = o
							.getUTCMinutes(), seconds = o.getUTCSeconds(), milli = o
							.getUTCMilliseconds();

					if (month < 10) {
						month = '0' + month;
					}
					if (day < 10) {
						day = '0' + day;
					}
					if (hours < 10) {
						hours = '0' + hours;
					}
					if (minutes < 10) {
						minutes = '0' + minutes;
					}
					if (seconds < 10) {
						seconds = '0' + seconds;
					}
					if (milli < 100) {
						milli = '0' + milli;
					}
					if (milli < 10) {
						milli = '0' + milli;
					}
					return '"' + year + '-' + month + '-' + day + 'T' + hours
							+ ':' + minutes + ':' + seconds + '.' + milli
							+ 'Z"';
				}

				pairs = [];

				if ($.isArray(o)) {
					for (k = 0; k < o.length; k++) {
						pairs.push($.toJSON(o[k]) || 'null');
					}
					return '[' + pairs.join(',') + ']';
				}

				// Any other object (plain object, RegExp, ..)
				// Need to do typeof instead of $.type, because we also
				// want to catch non-plain objects.
				if (typeof o === 'object') {
					for (k in o) {
						// Only include own properties,
						// Filter out inherited prototypes
						if (hasOwn.call(o, k)) {
							// Keys must be numerical or string. Skip others
							type = typeof k;
							if (type === 'number') {
								name = '"' + k + '"';
							} else if (type === 'string') {
								name = $.quoteString(k);
							} else {
								continue;
							}
							type = typeof o[k];

							// Invalid values like these return undefined
							// from toJSON, however those object members
							// shouldn't be included in the JSON string at all.
							if (type !== 'function' && type !== 'undefined') {
								val = $.toJSON(o[k]);
								pairs.push(name + ':' + val);
							}
						}
					}
					return '{' + pairs.join(',') + '}';
				}
			};

	/**
	 * jQuery.evalJSON Evaluates a given json string.
	 * 
	 * @param str
	 *            {String}
	 */
	$.evalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse
			: function(str) {
				/* jshint evil: true */
				return eval('(' + str + ')');
			};

	/**
	 * jQuery.secureEvalJSON Evals JSON in a way that is *more* secure.
	 * 
	 * @param str
	 *            {String}
	 */
	$.secureEvalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse
			: function(str) {
				var filtered = str
						.replace(/\\["\\\/bfnrtu]/g, '@')
						.replace(
								/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
								']').replace(/(?:^|:|,)(?:\s*\[)+/g, '');

				if (/^[\],:{}\s]*$/.test(filtered)) {
					/* jshint evil: true */
					return eval('(' + str + ')');
				}
				throw new SyntaxError(
						'Error parsing JSON, source is not valid.');
			};

	/**
	 * jQuery.quoteString
	 * Returns a string-repr of a string, escaping quotes intelligently.
	 * Mostly a support function for toJSON.
	 * Examples:
	 * >>> jQuery.quoteString('apple')
	 * "apple"
	 *
	 * >>> jQuery.quoteString('"Where are we going?", she asked.')
	 * "\"Where are we going?\", she asked."
	 */
	$.quoteString = function(str) {
		if (str.match(escape)) {
			return '"'
					+ str.replace(escape, function(a) {
						var c = meta[a];
						if (typeof c === 'string') {
							return c;
						}
						c = a.charCodeAt();
						return '\\u00' + Math.floor(c / 16).toString(16)
								+ (c % 16).toString(16);
					}) + '"';
		}
		return '"' + str + '"';
	};

}(jQuery));